*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: #1a1a2e;
    background: #fafafa;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1a1a2e;
    text-decoration: none;
}

.navbar-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.navbar-links a {
    color: #555;
    text-decoration: none;
}

.navbar-links a:hover {
    color: #1a1a2e;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

.hero {
    text-align: center;
    padding: 4rem 1rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    color: #555;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    background: #1a1a2e;
    color: #fff;
    border: none;
    cursor: pointer;
    margin: 0.25rem;
}

.btn:hover {
    background: #16213e;
}

.btn-secondary {
    background: transparent;
    color: #1a1a2e;
    border: 2px solid #1a1a2e;
}

.btn-secondary:hover {
    background: #1a1a2e;
    color: #fff;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
}

/* === Toast Notifications === */
#toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.toast {
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    color: #fff;
    max-width: 400px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateX(120%);
    transition: transform 0.3s ease;
    pointer-events: auto;
}

.toast-visible {
    transform: translateX(0);
}

.toast-error   { background: #e74c3c; }
.toast-success { background: #28a745; }
.toast-info    { background: #1a1a2e; }

/* === Navbar User Dropdown === */
.navbar-user {
    position: relative;
}

.navbar-user-btn {
    background: none;
    border: none;
    color: #555;
    font-size: inherit;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0;
}

.navbar-user-btn:hover {
    color: #1a1a2e;
}

.navbar-user-btn svg {
    transition: transform 0.2s;
}

.navbar-user.open .navbar-user-btn svg {
    transform: rotate(180deg);
}

.navbar-dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    min-width: 180px;
    overflow: hidden;
    z-index: 100;
}

.navbar-user.open .navbar-dropdown {
    display: block;
}

.navbar-dropdown a {
    display: block;
    padding: 0.65rem 1rem;
    color: #333;
    text-decoration: none;
    font-size: 0.9rem;
    transition: background 0.15s;
}

.navbar-dropdown a:hover {
    background: #f5f5f5;
    color: #1a1a2e;
}

/* === Responsive Navbar === */
@media (max-width: 600px) {
    .navbar {
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
    }

    .navbar-brand {
        font-size: 1.1rem;
    }

    .navbar-links {
        gap: 0.5rem;
        font-size: 0.85rem;
        flex-wrap: wrap;
    }

    .navbar-dropdown {
        position: fixed;
        right: 0.5rem;
        top: auto;
    }

    .container {
        padding: 1rem;
    }
}